1969-2001 Mini Service & Repair Manual

Page 14

Every 6000 miles or 6 months 13 Engine/transmission oil and filter renewal

1•13

2

1 Frequent oil changes are the best preventive maintenance the home mechanic can give the engine, because ageing oil becomes diluted and contaminated, which leads to premature engine wear. 2 Make sure that you have all the necessary tools before you begin this procedure. You should also have plenty of rags or newspapers handy, for mopping up any spills. The oil should preferably be changed when the engine is still fully warmed-up to normal operating temperature, just after a run; warm oil and sludge will flow out more easily. Take care, however, not to touch the exhaust or any other hot parts of the engine when working under the vehicle. To avoid any possibility of scalding, and to protect yourself from possible skin irritants and other harmful contaminants in used engine oils, it is advisable to wear gloves when carrying out this work. Access to the underside of the vehicle is greatly improved if the vehicle can be lifted on a hoist, driven onto ramps, or supported by axle stands. (see “Jacking and vehicle support”). Whichever method is chosen, make sure that the vehicle remains level, or if it is at an angle, that the drain point is at the lowest point.

13.3 Engine/transmission oil drain plug (arrowed)

Oil filter renewal 6 The oil filter is located underneath the dynamo or alternator on the forward-facing side of the engine. On early manual transmission models the filter is of the disposable cartridge type contained within an aluminium bowl. On later models a throwaway canister is used. All automatic transmission models utilise the cartridge type filter. To renew the filter proceed as follows.

Keep the drain plug pressed into the sump while unscrewing it by hand the last couple of turns. As the plug releases, move it away sharply so the stream of oil issuing from the sump runs into the container, not up your sleeve!

3 Position the draining container under the drain plug on the side of the transmission casing, and unscrew the plug (see illustration). If possible, try to keep the plug pressed into the sump while unscrewing it by hand the last couple of turns. 4 Allow the oil to drain into the container (see Haynes Hint), and check the condition of the plug’s sealing washer; renew it if worn or damaged. Also wipe off any metal particles that may have accumulated on the magnet. 5 Allow some time for the old oil to drain, noting that it may be necessary to reposition the container as the oil flow slows to a trickle; when the oil has completely drained, wipe clean the drain plug and its threads in the transmission and refit the plug, tightening it to the specified torque.

7 Reposition the draining container under the oil filter then undo and remove the long centre bolt securing the bowl to the housing (see illustration). On some models it may be advantageous to remove the grille panel, as space is rather limited. 8 With the bolts released, carefully lift away the filter bowl, which contains the filters and will also be full of oil. 9 Discard the old filter element but first make sure that the metal pressure plate has not stuck to the bottom of it. Now thoroughly clean out the filter bowl, the bolt, and the parts associated with it, using paraffin or a suitable solvent (see illustration) Dry with a lint free cloth 10 A rubber sealing ring is located in a groove round the head of the filter housing and forms an effective leak-proof joint between the housing and the filter bowl. A new rubber sealing ring is supplied with each new filter element. 11 Carefully prise out the old sealing ring from the locating groove. If the ring has become hard and is difficult to move take

great care not to damage the sides of the sealing ring groove. 12 With the old ring removed, fit the new ring in the groove at four equidistant points and press it home a segment at a time. Do not insert the ring at just one point and work round the groove pressing it home as, using this method, it is easy to stretch the ring and be left with a small loop of rubber which will not fit into the locating groove (see illustration). 13 Reassemble the oil filter assembly by first passing up the bolt through the hole in the bottom of the bowl, with a steel washer under the bolt’s head and a rubber or felt washer on top of the steel washer and next to the filter bowl. 14 Slide the spring over the bolt followed by the other steel washer, the remaining rubber washer and finally the filter pressure plate concave face downwards. 15 After fitting the new element to the bowl, position the bowl on the rubber sealing ring then insert and hand tighten the bolt. Before finally tightening the centre bolt, ensure that the lip of the filter bowl is resting squarely on the rubber sealing ring and is not offset or seated off the ring. If the bowl is not seating properly, rotate it until it is. Run the engine and check the bowl for leaks.

13.7 Cartridge type oil filter and retaining bolt as seen from below

13.9 Components of the cartridge type oil filter

13.12 Fitting a new cartridge type oil filter sealing ring

Oil draining

Cartridge type

1


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Check the emission control equipment (Section

3min
page 34

Renew the brake fluid (Section

1min
page 36

Renew the coolant (Section

3min
page 35

Renew the spark plugs (Section

6min
page 33

Inspect the distributor cap, rotor arm and HT leads Section

6min
page 32

Check and if necessary adjust the valve clearances Section

4min
page 31

Renew the air cleaner element (Section

4min
page 30

Road test (Section

5min
page 29

paintwork (Section

3min
page 28

Lubricate the locks and hinges (Section Check the condition of the exterior trim and

4min
page 27

Check and if necessary adjust the carburettor idle speed and mixture settings (Section

5min
page 26

Check and if necessary adjust the ignition timing Section

4min
page 25

Check and if necessary adjust the clutch return stop (Section

4min
page 22

Check the condition of the contact breaker points and adjust or renew (Section

5min
page 20

Lubricate the distributor (Section

4min
page 21

Check and if necessary top up the carburettor piston dashpot and lubricate the linkage Section

3min
page 19

Check all underbonnet components and hoses for fluid leaks (Section

5min
page 18

Check the condition of the driveshaft gaiters Section

5min
page 15

Lubricate the suspension and steering grease points (Section Check the condition of the rear brake shoes and

4min
page 16

renew if necessary (Section

4min
page 17

pads, and renew if necessary (Section

4min
page 14

Renew the engine/transmission oil and filter Section Check the condition of the front brake shoes and/or

3min
page 13

Check the headlight beam alignment (Section

3min
page 12

Section

4min
page 11

Inspect the clutch hydraulic components Section Check the condition of the seats and seat belts

4min
page 10

Check the condition and security of the exhaust system (Section Check the condition of the fan belt and renew if

1min
page 7

Check the condition of the air pump drivebelt (where applicable) and renew if necessary Section

5min
page 9

Check the condition and security of the steering and suspension components (Section

1min
page 5

necessary (Section

1min
page 8

Check the operation of the handbrake and adjust if necessary (Section

3min
page 4
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